Rock crusher



c. A. BUTLER ROCK CRUSHER April 5, 1960 3 Sheets-Sheet 1 Filed June 30, 1958 ATTORNEYS C. A. BUTLER ROCK CRUSHER April 5, 1960 3 Sheets-Sheet 2 Filed June 30, 1958 AW JUN-JE L i Q i Z m mm W. PT

w A m J ow R. r C DYU c. A. BUTLER 2,931,585

ROCK CRUSHEZR 5 Sheets-Sheet 3 I i I INVENTOR Cl YDE A. BUTLER MOW ATTORNEYS -EIIP P I I. a M OT/ 6N6 0N6 @N April 5, 1960 Filed June 30, 1958 United States atent ROCK CRUSHER Clyde A. Butler, Placerville, Calif. 1 l -Ap lic'ation Jausao, 1958, Serial No. 745,728

3 Claims. (Cl. 241-219 The present invention relates to improvements in a'rock crusher. It consists of the combinations, constructions and arrangement of parts, as hereinafter described and claimed.

It is proposed in the present invention to provide a rock crusher which has a fixed jaw and a movable jaw, the jaws being arranged to crush rocks therebetween, and the movable jaw being actuated :by a very sturdy and efficient Moreover, the movable jaw is" toggle arm arrangement. caused to-.swing on a downward are as it swings toward the fixed jaw. The lines of'force ofthe movable jaw are at right angles to the face of the fixed jaw; and there are no rock slippage, no rubbing, and there is less abrasion, and thus the jaws will last longer during continued use of the crusher.

Moreover, it is proposed to provide arrock crusher which will produce a high rate of production of crushed,

Drawings Fog a better understanding of the invention, reference should be had .to-the accompanying drawings, forming part of this specification, in which;

Figure 1 is a longitudinal sectional view taken through my rock crusher, parts being shown in elevation; V

Figure 2 is a horizontal sectional view takenalong the line II --II of Figure l; V

Figure 3 is a fragmentary sectional view taken along the line IIIlII of Figure 2; I ,Figure 4 is. a face view of one of the adjustable shims that is usedto vary the stroke of the movable jaw;

'Figures 5 and 6 are transverse sectional views taken along the lines VV and VIVI, respectively, of Figure l. V

While'I have shown only the preferred form of my invention, it should be understood that various changes, or modifications, may 'be made within the scope of the annexed claims ,without departing from the spirit thereof. 1

Detailed description Referring now to the drawings in detail, I have shown a supporting frame which is indicated generally at A, and defining a pair of spaced-apart and parallel upright side plates 10. As-disclos'ed in Figures 1 and 2, a fixed jaw B is mounted to extend between the side plates 10. This jaw consists of a sturdy backing member 11 that is Welded or otherwise secured to the side plates to extend therebetween, and further includes a face plate 12 mounted on the member 11, which is adapted to stand wear of rocks being crushed thereagainst.

It will be noted from Figures 1 and 2 that cheek plates 13 arexdisposed on the inner confronting surfaces of the side-plates 10, the cheek plates 13 being removably secured to the plates 10 by bolts 14, the latter having the heads 15 countersunk in the cheek plates. A pair of long tapering keys 16 are inserted between the cheek plates 13 and the face plate 12, the latter having recesses 17 fashioned therein to receive the keys 16. Each key is held in place by a bolt 18 that passes through a slot 19 provided in the adjacent side plate 10, as shown in" Figure 1.

' Moreover, the rock crusher includes a movable jaw C that is mounted to extend between the side plates 10 for movement toward and away from the fixed jaw B so as to crush rocks disposed between these two jaws. It will be noted that whenthe jaw C is moved away from the jaw B, a downwardly conver'gingthroat D is provided between the two jaws (see Figure 1) into which the rocks are fed by a hopper E. The movable jaw C includes a sturdy backing member 20 having a wear plate 21 mounted on its front surface. It will be observed that the backing member 20 has an undercut recess 22 at its lower end into. which allower tapered edge 23 of the wear plate 21 is adapted to fit. A wedge-shaped member. 24 is secured by bolts 25 to the backing member 20 so as to fit against and hold the top edge 26 of the wear plate 21 in place. 3

For the purpose-of reciprocating the movable jaw C toward and away from the fixed jaw B, I provide a toggle arrangement that is designated generally at F in Figures 1 and 2, the details of which will now be described. It will be noted thatan upper pairof front toggle arms G are provided, each having a forward end connected to the movable jaw C 'by a wrist pin 27, the latter passing through a plurality of apertured brackets 28 which are formed integral with and project rearwardly from the backing member 20. Keeper rings or collars 29 are secured to the opposite ends of the wrist pin 27 to retain the latter in place. 7 As a further part of the toggle arrangement F, an upper stationary pressure block H is secured to the supporting frame A near the back of the latter, as clearly shown in Figures land 2. Moreover, an upper pair of rear toggle 7 arms I are provided, each having a back end connected to the stationary pressure block H by a wrist pin 30. This Wrist pin has keeper rings orcollars 31 secured to the opposite ends thereof so as to retain the wrist pin 30 in place.

" It will be apparent from Figures 1 and 2 that the upper front and rear toggle arms G and I, respectively, extend toward and overlap each other and are connected together by an upper intermediate wrist pin 32. The latter is provided with keeper rings or collars 33 for holding the wrist pin 32 in place (see Figures 2 and 6).

In its further structural details, the toggle arrangement F includes a lower pair of front toggle arms K, each having a forward end connected by a wrist pin 34 to the movable jaw C. This wrist pin projects through aper tured brackets 35 that are formed integral with and extend rearwardly from the jaw C. The wrist pin 34 has keeper rings orcollars 36 secured to its opposite ends as shown in Figures 1 and 5. Also, the toggle arrange-- 1 rings or collars 38 on its opposite ends, as suggested in Figure 1, thus retaining the wrist pin 37 in place. The lower front and rear toggle arms K and M, respectively, extend toward one another and are connected together by a lower intermediate wrist pin 39, the latter being prgvided with keeper rings or collars 40 at its opposite en s.

Upper and lower connecting rods N and 0, respectively, are mounted on the upperand lower intermediate wrist pins 32 and 39, respectively,'these'connecting'rods projecting toward and overlapping each other (seeYFigures 1 and 6). A drive shaft P projects through' the overlapping parts of the connecting rods N and O, and is supported for rotation in bearing housings Q, the latter having flanges 41 that are secured to the side plates 10" by studs 42 (see Figure 6). This drive shaft is'provided' with an eccentric 43 that engages with the inner races 44 of bearings R that are carried by theconnecting rods N and (see Figures 1 and 6'). Bearing lock nuts 45 are threaded onto the eccentric 43 adjacent to the lateral sides 46 of the upper connecting rod N. Also, grease retainers 47 are provided between the connecting rods Nand O, as indicated in Figure6.

The shaft P should be of suflicient'length to carry fly wheels 48 on both sides of the supporting frame A,-as

shown in Figure 6; also, a conventional overload re-1 lease driving pulley 49 is secured to one end of the shaft P. t

As the drive shaft P and its eccentric 43 are-rotated, the connecting rods N and O are reciprocated up and down to thereby contract and expand the toggle arrangement F, and thus imparting reciprocating movement through the toggle arms to the movable jaw C.

For the purpose of causing the movable jaw- C to move in a definite predetermined path during its reciprocation, I have provided a transverse shaft 50, which is mounted in journal boxes 51 that are secured by'bolts 52 to the side walls 10, as illustrated in Figure 5. An upwardly extending suspension arm S has its lower end journalled on the shaft 50, while its upper end is journalled on' the wrist pin 27. The arm S is located and acts in combination with movements of all of the toggle arms so as to swing the movable jaw C on a downward arc, as the movable jaw C moves toward the fixed jaw B. The movement of the jaw C is shown by dot-dash line'in Figure 1. Thus there will be no rock slippage, no rubbing of the particles of rock, and the jaws' will last longer.

It will be apparent that the longer travel of the jaw C is at the top of the latter, and this will break down the larger rocks quicker. The shorter stroke is at the bottom of the movable jaw C, resulting in less by-passing of over- 4. between the lower front toggle arms K and the lower rear toggle arms M (see Figure 6). Moreover, the jaw suspension arm S has its top end interposed between the upper front toggle arms G (see Figures 2 and 5), giving good balance to the crusher.

Turning now to the lower adjustable toggle arm block L, as previously mentioned, it will be seen from Figures 1 to 3, inclusive, that this block is carried by a pressure member T that is secured to the side walls 10. This member has a bore 58 fashioned therein for receiving a portion of the block L (see Figure 3). Moreover, member T is provided with a cylinder 59 into which a piston 60 on the block L projects. Also, Figures 1 and 2 disclose a pair of rods" 61 which have their forward ends secured to the block L by any suitable means, such as threads 62 shown in Figure 1. These rods extend rearwardly through bores 63 formed in the member T, and

' compression springs 64 are interposed between the pressure member T and nuts 65 that are threaded onto the rear ends of the rods 61.

A number of shims 66 of the shape shown in Figure 4 may be inserted between the rear end of the toggle arm block L and a wall 67 provided in the pressure member T (see Figure 1). Each of these shims has a notch 68in one end thereof, which is adapted to fit over one of the rods 61, as shown in Figure 1. The other end of each shim projects laterally from a side plate 10, as indicated in Figure 2, and this projecting end of the shim has asecond notch 69 therein. A locking bolt 70 is carried by apertured lugs 71 that project from each of the side plates 10, and one of these locking bolts is provided at each side of the crusher frame A, as will be apparent from Figure 2. These locking bolts extend through the notches 69 so as to removably retain the shims 66 in place.

In order to move the block L forwardly relative to the pressure member T when adding or removing shims 66, I have provided a hydraulic jack U, as shown in Figures 2 and 3. This jack' maybe removably secured to the member T by a clip frame 72. The jack U defines a cylinder 73 in which a piston 74 is slidablymounted (see Figure 3). When fluid under pressure is admitted through a hose 75 in back of the piston 74, the latter is forced forwardly so as to push the piston 60 in the same direction. This will allow the shims to be changed;

' and, thereafter, the jack U may be removed. Since the size rock. Greater force is required at the bottom of the jaw. A straight forward breaking action occurs on the full face of the movable jaw C, which is a floating jaw. More tons of crushed rock will be, produced per hour, with less horsepower required. Only a small part of the breaking force is applied on the eccentric 43, and there is less strain on the bearings'of'the' crusher, with less heat, and more revolutions per minute is possible.

As shown in Figures 1, 5 and 6, a crusher frame cap 55 is mounted on top of the side walls 10, but this cap is'arranged so that it will not interfere with feeding rock into the throat D from the hopper E. Also, a guide plate 56 extends transversely between the side plates 10 so as to prevent particles of the incoming rock from passing rearwardly over the top of the movable jaw C. The plate 56 is supported by brackets 57 that are fastened to the side plates 10 of the supporting frame A.

It will be obvious that the upper and lower connecting rods N and 0 may be lengthened or shortened so as to vary the stroke of the movable jaw C. Different lengths of connecting rods could be installed in like crushers for different conditions of rocks to be crushed.

In order to promote good balance to the crusher, the upper connecting rod N has been interposed between the upper front toggle arms G and the upper rear toggle arms -J, as will appear by reference to Figure 2. Also, the lower connecting rod 0 has its bottonrend interposed shims 66 extend laterally beyond the side plates 10, they may be readily grasped for removal. As shims are added or removed, the stroke ofthe movable jaw C will be changed.

Referring now to Figures 1 and 2, I have shown blocks 76'which are removably secured to the inner faces of the side plates 10 by bolts 77. These blocks are designed to en'ga'ge with the cheek plates'13 so as to hold the latter in place.

Referring to Figure 2, I have shown an opening 78 in each side of frame 10 for removal or replacing wristpin 30.

I claim:

1. In a rock crusher: a supporting frame; a fixed jaw secured to said frame; a movable jaw mounted for movement toward and away from the fixed jaw so as to crush ro'cks disposed therebetween; at least one upper front toggle arm having a forward end connected by a Wrist pin to the movable jaw; an upper stationary pressure block secured to the supporting frame-near the back of the latter; at least one upper rear toggle arm having a back end connected to the stationary pressure block by a wrist pin; said upper toggle arms extending toward and overlapping each other and being connected together by an upper intermediate wrist pin; at least one lower front toggle arm having a forward end connected by a wrist pin to the movable jaw; a lower toggle arm block mounted near the back-of the supporting frame; at least and being connected together by a lower intermediate wristpin; upper and lower connecting rods mounted on the upper and lower intermediate wristpins, respectively; these connecting rods projecting toward and overlapping each other; a drive shaft projecting through the overlapping parts of the connecting rods and carried by the supporting frame, and being provided with an eccentric disposed to reciprocate the connecting rods up and down to contract and expand the toggle arrangement provided by the toggle arms, when the drive shaft is rotated, thereby imparting reciprocating movement through the toggle arms to the movable jaw; a transverse shaft disposed in back of the movable jaw and being carried by the supporting frame; and an upwardly extending jaw suspension arm having its lower end journalled on said transverse shaft; said suspension arm having an upper end journalled on the wristpin disposed between the upper front toggle arm and the movable jaw; said suspension arm being located and acting in combination with movements of all of the toggle arms so as to swing the movable jaw on a downward are as the latter moves toward the fixed jaw. I

2. The rock crusher, as set forth in claim 1; and in which the suspension arm extends vertically above said transverse shaft at the beginning of the forward stroke of the movable jaw toward the fixed jaw, whereby the movable jaw will immediately swing on a downward are as it moves toward the fixed jaw.

3. In a rock crusher: a supporting frame; a fixed jaw secured to said frame; a movable jaw mounted for movement toward and away from the fixed jaw so as to crush rocks disposed therebetween; an upper pair of front toggle arms, each having a forward end connected to the movable jaw by a wristpin; an upper stationary pressure block secured to the supporting frame near the back of the latter; an upper pair of rear toggle arms, each having a back end connected to the stationary pressure block by a wristpin; the upper front and rear toggle arms extending toward and overlapping each other and being connected together by an upper intermediate wrist pin; a lower pair of front toggle arms, each having a forward end connected by a wristpin to the movable jaw; a lower adjustable to'ggle arm block mounted near the back of the supporting frame; a lower pair of rear toggle arms, each having a back end connected to the lower toggle arm block by a wristpin the lower front and rear toggle arms extending toward and overlapping each other and being connected together by a lower intermediate wristpin; upper and lower connecting rods mounted on the upper and lower intermediate wristpins, respectively, these connecting rods projecting toward and overlapping each other; a drive shaft projecting through the overlapping parts of the connecting rods and carried by the supporting frame, and being provided with an eccentric disposed to reciprocate the connecting rods up and down to contract and expand the toggle arrangement provided by the toggle arms, when the drive shaft is r0- tated, thereby imparting reciprocating movement through the toggle arms to the movable jaw; a transverse shaft disposed in back of the movable jaw and being carried by the supporting frame; and an upwardly extending suspension arm having its lower end journalled on said transverse shaft; said suspension arm having an upper end journalled on the wristpin disposed between the upper front toggle arms and the movable jaw; said suspension arm being located and acting in combination with movements of all of the toggle arms so as to swing the movable jaw on a downward are as the latter moves toward the fixed jaw.

References Cited in the file of this patent 'UNITED STATES PATENTS 657,958 Reynolds Sept. 18, 1900 2,084,188 Buchanan June 15, 1937 2,352,970 Pollitz July 4, 1944 2,353,955 Edwards July 18, 1944 2,485,717 Ebersol' Oct. 25, 1949 2,738,933 Dougherty Mar. 20, 1956 2,865,570 Nutting Dec. 23, 1958 FOREIGN PATENTS 7,494 Germany Sept. 29, 1879 

